Citation(s) from the GunPolicy.org literature library
Alpers, Philip and Conor Twyford. 2003 ‘Stockpiles and Trafficking in the Pacific.’ Small Arms in the Pacific; Occasional Paper No. 8, p. 20. Geneva: Small Arms Survey, the Graduate Institute of International and Development Studies, Geneva. 31 March
Home-made firearms form another distinguishing feature of Papua New Guinea's illicit weapon trade. A small cottage industry exists on the Papua New Guinea mainland, producing crude, single-shot guns and pistols, made mostly from water pipes, and using mostly 12-gauge ammunition. Home-made single-shot guns and pistols have been found throughout Papua New Guinea, from Lae to West New Britain to the Highlands.
Though it is difficult to pinpoint the main centres of production or volumes being produced, the Highlands have in the past been a centre of both demand and supply… Police reports indicate that these weapons are manufactured exclusively for domestic use, rather than export (United Nations, 1998).
Economic value to local communities in the region is very small, although in some parts of Papua New Guinea, guns are used as barter items. Presumably this trade includes home-made weapons.